毛乌素沙地典型县域土地沙漠化过程研究  

Study on Land Desertification Process Between Two Representative Counties in Mu Us Sandland

作　　者：胡兵辉[1] 廖允成[2] 王克勤[1] 王维[1] 

机构地区：[1]西南林业大学环境科学与工程学院,云南昆明650224 [2]西北农林科技大学农学院,陕西杨凌712100

出　　处：《人民黄河》2012年第2期89-92,共4页Yellow River

基　　金：教育部高等学校科技创新工程重大项目培育资金项目(706054);西南林业大学水土保持与荒漠化防治重点学科建设项目

摘　　要：在近58 a的时间尺度上,以毛乌素沙地偏农区的榆阳区和偏牧区的乌审旗作为研究对象,选择农牧业人口数量、牲畜数量、耕地面积和降水量、蒸发量、大风日数作为驱动土地沙漠化的社会因子和自然因子,建立土地沙漠化因子综合影响系数模型,研究两地区土地沙漠化的因子影响系数、社会因子影响系数、自然因子影响系数及综合影响系数演变状况。结果表明:榆阳区土地沙漠化因子的影响系数大小排序为农牧业人口数量、耕地面积、降水量、蒸发量、牲畜数量、大风日数;乌审旗的影响系数大小排序为农牧业人口数量、牲畜数量、耕地面积、降水量、蒸发量、大风日数。两地区土地沙漠化社会因子影响系数呈上升趋势,社会因子是导致两地区土地沙漠化的主要推动力。On 58 years scale, 6 natural and social factors of land desertification were applied in Mu US Sandland. Yuyang District, farming-dominant zone, and Ushen Banner, grazing-dominant zone, were served as contradistinctive study objects, the two places were representatives of land desertification process in regions with different industrial models. Through model building and quantitative evaluation of factor effect coefficient, social factor effect coefficient, natural factor effect coefficient and factor comprehensive effect coefficient of land desertification process, as the result, the orders of factor effect coefficient of land desertification process in Yuyang District are as follows ： population, agricultural acreage, precipitation, evaporation capacity, livestock number and gale frequency. While the orders in Ushen Banner are as follows： population, livestock number, agricultural acreage, precipitation, evaporation capacity and gale frequency. Moreover, the social factor effect coefficients of land desertifieation process always show a rising trend in 58 years, and the social factors are the main impetus of land desertification in these two places.

关 键 词：土地沙漠化 社会因子 自然因子 影响系数 毛乌素沙地 

分 类 号：F301.24[经济管理—产业经济]